用命令 df 即可

# df /var/lib/

Filesystem           1K-blocks      Used Available Use% Mounted on

/dev/sda3            135979984  66905292  62055896  52% /

加上-kh更容易看些：

# df /var/lib/ -kh

Filesystem            Size  Used Avail Use% Mounted on

/dev/sda3             130G   64G   60G  52% /

# df -kh

Filesystem            Size  Used Avail Use% Mounted on

/dev/sda3             130G   64G   60G  52% /

/dev/sda1              99M   18M   76M  20% /boot

tmpfs                  12G     0   12G   0% /dev/shm

/dev/sdb              458G  379G   56G  88% /data

转载：http://www.bitscn.com/os/linux/201506/516204.html